glazed
Having glass in the windows.
glazed: fitted with glass panes or a glass-like coating
In construction, glazing means installing glass panes into window frames, doors, or other openings. A glazed window or door is one where glass has been cut, fitted, and sealed into the frame using putty, silicone, or mechanical gaskets. The glass sits in grooves called rabbets, held in place by glazing compound or modern synthetic sealants. Double-glazed units, common since the 1980s, sandwich two panes with an air gap or inert gas between them for thermal resistance.
Glazing work requires precision. Glass thickness varies by application: single panes in older buildings run 3 to 4 mm, while modern double-glazed sealed units are typically 24 to 28 mm thick overall, with each pane between 3 and 6 mm depending on the window's exposure and thermal requirements. Toughened or laminated glass is specified where impact or safety is a concern, such as in ground-floor windows or glass doors.
Common problems and variants
Glazing failures occur when sealants degrade, allowing water ingress and condensation between panes. Edge seals in double-glazed units typically last 10 to 20 years before failing. In industrial or commercial settings, structural glazing uses adhesive silicone to bond glass directly to the building frame, eliminating visible frame members; this method demands careful control of sealant cure times and temperature. Frameless glazing, popular in shopfronts, relies entirely on mechanical fixings and edge-bonding silicone.
The term glazed also applies to finishes on bricks, tiles, and ceramics, where a glass-like layer is fused to the surface during firing. In this context it is chemically distinct from window glazing, though both create a smooth, impermeable, glass-like surface. In masonry, glazed bricks are specified for wet environments or where washability matters, such as kitchens or laboratories.
Glazing contractors must account for building movement, thermal expansion, and wind loading when sealing glass into frames. Insufficient clearance or over-tight caulking can cause thermal stress fractures. In heritage work, original glazing patterns and putty profiles are sometimes replicated using traditional linseed oil putty rather than modern synthetic compounds, to preserve authenticity and allow for traditional repair methods.